/*
 * TeleStax, Open Source Cloud Communications  Copyright 2012.
 * and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.mobicents.protocols.ss7.cap.service.gprs.primitive;

import java.io.IOException;

import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.cap.api.CAPException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.cap.api.service.gprs.primitive.GPRSQoS;
import org.mobicents.protocols.ss7.cap.primitives.CAPAsnPrimitive;
import org.mobicents.protocols.ss7.map.api.MAPException;
import org.mobicents.protocols.ss7.map.api.MAPParsingComponentException;
import org.mobicents.protocols.ss7.map.api.service.mobility.subscriberManagement.ExtQoSSubscribed;
import org.mobicents.protocols.ss7.map.api.service.mobility.subscriberManagement.QoSSubscribed;
import org.mobicents.protocols.ss7.map.service.mobility.subscriberManagement.ExtQoSSubscribedImpl;
import org.mobicents.protocols.ss7.map.service.mobility.subscriberManagement.QoSSubscribedImpl;

/**
 * 
 * @author Lasith Waruna Perera
 * 
 */
public class GPRSQoSImpl implements GPRSQoS , CAPAsnPrimitive{
	
	public static final String _PrimitiveName = "GPRSQoS";
	
	public static final int _ID_shortQoSFormat = 0;
	public static final int _ID_longQoSFormat = 1;
	
	private QoSSubscribed shortQoSFormat;
	private ExtQoSSubscribed longQoSFormat;
	
	public GPRSQoSImpl() {

	}
	
	public GPRSQoSImpl(QoSSubscribed shortQoSFormat) {
		this.shortQoSFormat = shortQoSFormat;
	}
	
	public GPRSQoSImpl(ExtQoSSubscribed longQoSFormat) {
		this.longQoSFormat = longQoSFormat;
	}

	@Override
	public QoSSubscribed getShortQoSFormat() {
		return this.shortQoSFormat;
	}
	@Override
	public ExtQoSSubscribed getLongQoSFormat() {
		return this.longQoSFormat;
	}
	
	@Override
	public int getTag() throws CAPException {
		if(shortQoSFormat!=null){
			return _ID_shortQoSFormat;
		}else{
			return _ID_longQoSFormat;
		}
		
	}
	
	@Override
	public int getTagClass() {
		return Tag.CLASS_CONTEXT_SPECIFIC;
	}
	
	@Override
	public boolean getIsPrimitive() {
		return true;
	}
	
	@Override
	public void decodeAll(AsnInputStream ansIS)
			throws CAPParsingComponentException {
		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (MAPParsingComponentException e) {
			throw new CAPParsingComponentException("MAPParsingComponentException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}
	@Override
	public void decodeData(AsnInputStream ansIS, int length)
			throws CAPParsingComponentException {

		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (MAPParsingComponentException e) {
			throw new CAPParsingComponentException("MAPParsingComponentException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
		
	}
	
	private void _decode(AsnInputStream ais, int length) throws CAPParsingComponentException, IOException, AsnException, MAPParsingComponentException {
		
		this.shortQoSFormat = null;
		this.longQoSFormat = null;

		int tag = ais.getTag();

		if (ais.getTagClass() == Tag.CLASS_CONTEXT_SPECIFIC) {
			switch (tag) {
			case _ID_shortQoSFormat:
				if (!ais.isTagPrimitive())
					throw new CAPParsingComponentException(
							"Error while decoding " + _PrimitiveName + ".shortQoSFormat: Parameter is not primitive",
							CAPParsingComponentExceptionReason.MistypedParameter);
				this.shortQoSFormat = new QoSSubscribedImpl();
				((QoSSubscribedImpl) this.shortQoSFormat).decodeData(ais, length);
				break;
			case _ID_longQoSFormat:
				if (!ais.isTagPrimitive())
					throw new CAPParsingComponentException(
							"Error while decoding " + _PrimitiveName + ".longQoSFormat: Parameter is not primitive",
							CAPParsingComponentExceptionReason.MistypedParameter);
				this.longQoSFormat = new ExtQoSSubscribedImpl();
				((ExtQoSSubscribedImpl) this.longQoSFormat).decodeData(ais, length);
				break;

			default:
				throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad choice tag",
						CAPParsingComponentExceptionReason.MistypedParameter);
			}
		} else {
			throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad choice tagClass",
					CAPParsingComponentExceptionReason.MistypedParameter);
		}

	}
	
	@Override
	public void encodeAll(AsnOutputStream asnOs) throws CAPException {
		this.encodeAll(asnOs, this.getTagClass(), this.getTag());
		}
	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag)
			throws CAPException {

		try {
			asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}
	
	@Override
	public void encodeData(AsnOutputStream asnOs) throws CAPException {
		if (this.shortQoSFormat == null && this.longQoSFormat == null || this.shortQoSFormat != null && this.longQoSFormat != null) {
			throw new CAPException("Error while decoding " + _PrimitiveName + ": One and only one choice must be selected");
		}

		try {
			if (this.shortQoSFormat != null) {
				((QoSSubscribedImpl) this.shortQoSFormat).encodeData(asnOs);
			} else {
				((ExtQoSSubscribedImpl) this.longQoSFormat).encodeData(asnOs);
			}	
		} catch (MAPException e) {
			throw new CAPException("MAPException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}

	}
	

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append(_PrimitiveName + " [");

		if (this.shortQoSFormat != null) {
			sb.append("shortQoSFormat=");
			sb.append(this.shortQoSFormat.toString());
		}
		
		if (this.longQoSFormat != null) {
			sb.append("longQoSFormat=");
			sb.append(this.longQoSFormat.toString());
		}

		sb.append("]");

		return sb.toString();
	}

}
